US3522078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating titanium dioxide
Assignee: PPG Industries Inc
•
Filing: 1967-04-21
•
Granted: 1970-07-28
•
Expires: 1987-04-21
Abstract
No abstract record available.
Inventors
- 👤 Russell R May Jr
- 👤 Robert H Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:08
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3653; C09C1/3661; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/19; C01P2006/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB1022621A
Cited
US3152000A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |